Three people were stabbed in an altercation early Saturday morning in Manchester, said police.

It started when a man and a woman knocked on the door at 420 Maple St., apartment 4, at about 1:30 a.m. and got in a fight with two male teenagers inside, said officials.

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The man then pulled out a knife and stabbed the teens, cutting them on their hands and arms, said police.

One of the teen's fathers stepped in and tried to stop the fight. That's when the male suspect stabbed him in the chest, but police said the blade hit the father's breastbone and did not penetrate. The man and woman then ran off.

Police said the injuries were non-life-threatening and described the wounds as "superficial."

Police had not made any arrests as of Saturday morning and were still trying to determine what caused the fight, but investigators said they believed the teens knew the woman.